{"product_id":"water-pump-repair-kit-fits-mercury-marine-25-30-hp-replaces-853792a07","title":"Water Pump Repair Kit – Fits Mercury Marine 25-30 HP (Replaces 853792A07)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eMercury Water Pump Repair Kit 8M0208905\u003c\/strong\u003e is designed for Mercury Marine 25-30 HP, 4-Stroke EFI outboard engines with serial numbers 0R106999 and above. It serves as a complete maintenance package to ensure optimal engine cooling and performance, also referred to as a \"Complete Maintenance Service Kit\" as it includes additional service components beyond the water pump itself.\u003c\/p\u003e\n\u003cp\u003eThis kit is a direct replacement for Mercury part numbers 853792A07 and 8M0208905, and provides an interchange for Sierra 18-43175 and QuickMarine 8M0208905.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for direct replacement to ensure a precise fit and straightforward installation.\u003c\/li\u003e\n\u003cli\u003eIncludes a complete water pump kit, thermostat, oil filter, fuel filter, and necessary gaskets.\u003c\/li\u003e\n\u003cli\u003eCombines essential service components for comprehensive preventative maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eSuperseded By\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine\u003c\/td\u003e\n        \u003ctd\u003e853792A07\u003c\/td\u003e\n        \u003ctd\u003e8M0208905\u003c\/td\u003e\n        \u003ctd\u003eOriginal OEM part number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine\u003c\/td\u003e\n        \u003ctd\u003e8M0208905\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eCurrent OEM part number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-43175\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eQuickMarine\u003c\/td\u003e\n        \u003ctd\u003e8M0208905\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine\u003c\/td\u003e\n        \u003ctd\u003eOutboard\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke EFI\u003c\/td\u003e\n        \u003ctd\u003e0R106999 and above\u003c\/td\u003e\n        \u003ctd\u003e853792A07\/8M0208905\u003c\/td\u003e\n        \u003ctd\u003eFor serial numbers 0R106999 and above\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine\u003c\/td\u003e\n        \u003ctd\u003eOutboard\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke EFI\u003c\/td\u003e\n        \u003ctd\u003e0R106999 and above\u003c\/td\u003e\n        \u003ctd\u003e853792A07\/8M0208905\u003c\/td\u003e\n        \u003ctd\u003eFor serial numbers 0R106999 and above\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater Pump Repair Kit\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMetal, Plastic, Rubber\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e0.23 lb (0.10 kg)\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 Year (QuickMarine), OEM warranty may vary\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eComplete kit includes impeller, pump housing, face plate, gaskets, seals, and o-rings\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Water Pump Impeller Kit (Replaces 8M0208905, 853792A07)\n    \u003cul\u003e\n      \u003cli\u003e1 x Impeller (345-65021)\u003c\/li\u003e\n      \u003cli\u003e1 x Insert Cup (161572)\u003c\/li\u003e\n      \u003cli\u003e1 x Wear Plate (161592)\u003c\/li\u003e\n      \u003cli\u003e1 x Key (28-161551)\u003c\/li\u003e\n      \u003cli\u003e1 x Gasket (27-161602)\u003c\/li\u003e\n      \u003cli\u003e1 x Gasket (27-161582)\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e4 x Bolt\u003c\/span\u003e (910103-5652)\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e1 x Thermostat Kit (8M0119207, 8M0214960)\u003c\/li\u003e\n  \u003cli\u003e1 x Fuel Filter (8M0162831, Sierra 18-7913)\u003c\/li\u003e\n  \u003cli\u003e1 x Oil Filter (8M0162831, Sierra 18-7913)\u003c\/li\u003e\n  \u003cli\u003e1 x Cotter Pin (8150264)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e3 x Drain Gaskets\u003c\/span\u003e (26-8M0007119, 8M0204693)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery terminals to prevent accidental starting.\u003c\/li\u003e\n  \u003cli\u003ePlace a drain pan under the lower unit and remove the gear lube drain\/fill screws to drain the oil.\u003c\/li\u003e\n  \u003cli\u003eRemove the propeller assembly.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and carefully lower the gearcase (lower unit) from the outboard's midsection.\u003c\/li\u003e\n  \u003cli\u003eRemove the old water pump housing, impeller, and associated gaskets and seals.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the driveshaft and all mating surfaces where the new pump will sit.\u003c\/li\u003e\n  \u003cli\u003eAssemble the new water pump kit components, starting with the base gasket, wear plate, and impeller.\u003c\/li\u003e\n  \u003cli\u003eApply a light coat of marine grease to the inside of the housing and slide it over the new impeller.\u003c\/li\u003e\n  \u003cli\u003eInstall the new seals and gaskets, ensuring everything is properly seated.\u003c\/li\u003e\n  \u003cli\u003eCarefully guide the lower unit back into place, aligning the driveshaft, shift shaft, and water tube.\u003c\/li\u003e\n  \u003cli\u003eBolt the gearcase securely and reinstall the propeller assembly.\u003c\/li\u003e\n  \u003cli\u003eRefill the lower unit with the correct gear lube, install new drain screw gaskets, and test the engine using a flush device to confirm water flow.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this kit fits my 25 HP Mercury engine?\u003c\/summary\u003e\n  \u003cp\u003eThis kit is specifically for 25 and 30 HP 4-Stroke EFI models with a serial number of 0R106999 or higher. It is critical to verify your engine's serial number before ordering to ensure compatibility.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing water pump?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include the engine running hotter than normal, an audible alarm if your engine has one, or a weak\/non-existent water stream from the tell-tale outlet port. Upon inspection, a worn, brittle, or melted impeller is a definitive sign of failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should the water pump be serviced?\u003c\/summary\u003e\n  \u003cp\u003eAs a general guideline, we recommend inspecting the impeller annually and replacing the entire water pump kit every 2-3 years or 200-300 hours of operation, whichever comes first. This interval can be shorter in saltwater or high-debris environments.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this just a water pump kit or a full service kit?\u003c\/summary\u003e\n  \u003cp\u003eThis is a comprehensive maintenance kit. In addition to the complete water pump components, it includes a thermostat, fuel filter, oil filter, and drain gaskets for a more thorough service, making it an excellent value.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eThe same part number (8M0162831) is listed for both the fuel and oil filter. Is this an error?\u003c\/summary\u003e\n  \u003cp\u003eNo, this is correct based on our supplier information. For the applications this kit covers, the same filter part number (or its aftermarket equivalent) is specified for both fuel and oil filtration.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723800252731,"sku":"QM-23KM775","price":56.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/QM-23KM775.png?v=1763032137","url":"https:\/\/seasierra.com\/products\/water-pump-repair-kit-fits-mercury-marine-25-30-hp-replaces-853792a07","provider":"SeaSierra","version":"1.0","type":"link"}